Western Digital Technologies, Inc.

Sandisk Technologies Inc.

Eran Moshe

Danny Berler

Shay Benisty

Daniel Lee Helmick

Gadi Vishne

Saifullah Nalatwad

Daphna Einav

Barrett Edwards

Pavel Teper

Lior Bublil

Shuli Shmaya

Selectively writing relevant bins directly to a controller's volatile memory (e.g., SRAM) based on a next-to-write address and writing the remaining bins to a host's volatile memory (e.g., DRAM or HMB), avoids the need for any additional reads from host's volatile memory and writes from controller's volatile memory. Avoiding the need for any additional reads from host's volatile memory, which has a slower access time than controller's volatile memory, improves exit latency from the boot and low-power-state exit flows. Prior to writing the parity bins to the controller or the host, the controller may store parity bins and/or the next-to-write address in non-volatile memory. The next-to-write address is then evaluated to determine whether a party bin is written to the controller's volatile memory or the host's volatile memory.

Optimized XOR loading to SRAM and HMB

Systems and methods for devices connected by a control bus to share configuration data for accelerating physical link negotiation for a peripheral interface are described. Computer devices, such as data storage devices, may include a peripheral interface configured to connect to a host system and a control bus interface to connect to a control bus. Other devices on the same control bus may establish peer communication through the control bus interface to share configuration data, such as coefficients for physical link negotiation of the peripheral interface. To accelerate reestablishing communication through the peripheral interface, the device may receive previously stored configuration data from another device over the control bus.

Using control bus communication to accelerate link negotiation

Systems and methods for peer data storage device messaging over a peer channel, such as a control bus, for vulnerability management are disclosed. Storage devices may include a host interface configured to connect to a host system and a peer interface to establish peer communication independent of host availability. The storage devices may determine security issues (for themselves or for peer storage devices) and send a threat notification through the peer interface, enabling peer storage devices to respond to peer security threats without relying on their host connections.

Peer storage device messaging for vulnerability management

A data storage device and method for reducing read disturbs when reading redundantly-stored data are provided. In one embodiment, a data storage device is provided comprising a memory and a controller. The memory is configured to redundantly store a plurality of copies of data, wherein the plurality of copies of the data comprise a primary copy of the data and at least one secondary copy of the data. The controller is configured to randomly select one of the plurality of copies of the data instead of selecting the primary copy of the data as a default; and read, from the memory, the randomly-selected one of the plurality of copies of the data. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.

Data storage device and method for reducing read disturbs when reading redundantly-stored data

Techniques are provided for capturing a processing state snapshot of a device under test (DUT) that enable a previous test run to be restored and resumed from the same point the snapshot was taken. The techniques enable restoring the snapshot into the same or a different device to resume a previous test run. In an illustrative example, a DUT is controlled by a Joint Test Action Group (JTAG) test controller to capture a Steady State Snapshot by controlling peripheral components of the DUT to complete any on-going tasks to reach a steady state and then flush data to a memory of the DUT. The flushed steady state peripheral component data and other processing state data is transferred to the test controller for analysis and for enabling the subsequent restore and resume operation. Solid state drive (SSD) examples are provided.

Test controller enabling a snapshot restore and resume operation within a device under test

Systems and methods for peer data storage device messaging over a control bus for power management are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer data storage devices may establish peer communication through the control bus interface, determine a power state, receive a power change indicator from a peer data storage device, and initiate a change in their power state. The peer data storage devices may manage their collective power as a power pool and increase or decrease power use without host intervention.

Peer storage device messaging for power management

A data storage device and method for preventing data loss during an ungraceful shutdown are provided. In one embodiment, a data storage device is provided comprising a volatile memory; a non-volatile memory; and a controller. The controller is configured to detect an ungraceful shutdown; and in response to detecting the ungraceful shutdown: generate a reduced set of parity bits for data stored in the volatile memory, wherein the reduced set of parity bits comprises fewer parity bits than a full set of parity bits used in a graceful shutdown; and store the data and the reduced set of parity bits in the non-volatile memory. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.

Data storage device and method for preventing data loss during an ungraceful shutdown

Systems and methods for peer storage devices to share host control data are described. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface to share host control data, such as access parameters for host resources allocated to peer storage devices. A storage device may access host resources using access parameters allocated to that device, receive peer access parameters from a peer storage device, and access host resources allocated to the peer storage device using the peer access parameters. For example, a storage device may use a peer host memory buffer to store buffer data prior to releasing the host memory buffer allocated to it.

Peer storage devices sharing host control data

Systems and methods for peer storage device messaging over a control bus to offload and back up internal operation data are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface, select internal operation data, and send the internal operation data to other peer storage devices through the control bus. Responsive to a recovery event, peer storage devices may receive the offloaded internal operation data from another peer storage device.

Growing community of inventors

Kfar Saba, Israel

Eran Moshe